Alice Springs town basin, review 2003
Read, R. E.
E-Publications; E-Books; PublicationNT; Report ; no. 42/2003
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Report ; no. 42/2003
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east of the Todd close to the saline margins of the basin, and it appears that saline water from the margins is moving to these bores. Figure 25 shows the distribution of bores with increasing salinity trends. For the other production bores the reduction in salinity is presumably a result of pumping an increased proportion of Todd River recharge water with time. 7376000 7377000 7378000 7379000 7380000 383000 384000 385000 386000 387000 Extent of sand aquifers, after Quinlan & Woolley (1969) Approximate maximum extent of saturated alluvium Boundary between Northern and Southern Zones Bores where TDS is erratic, no clear trend Bores where TDS has increased Bores where TDS is decreasing Figure 25 Salinity trends in production bores 5.4.10 Salt storage Berry (1992) estimated 47 000 T of salt (say 15 000 T of chloride) in the Town Basin. This was based on results of 11 auger holes. Estimated salt stored above the water table ranged from 3.5 to 21 kg/m2 with an average of 11.5 kg/m2, that is 11 500 T/km2. This estimate refers only to the approximately 4 km2 of the Town Basin with significant aquifers, and not to the low transmissivity parts of the basin and urbanised areas over weathered metamorphic rocks. Salt storage in the weathered rock areas 36
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